Gtjstae selander



' G. SELANDER.

TOOL HOLDER.

APPLICATION FILED 1UNE10, m5.

l l 96., l 6 l Patented Aug. 29, 1916.

GUSTAF SELANDER, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO ALBERT L.BADLEIN, 0F CHICAGO, ILLINOIS.

TOOL-HOLDER.

maaier.

Specification of Letters Patent.

Patented Aug. mi?, 19316.

To @ZZ ec wm t may concern Be it known that l, GUSTAF SnLANnnR, acitizen of the United States of America, and a resident of Chicago, inthe county of Cook, State of Illinois, have invented certain new anduseful Improvements in Tool- Holders, of which the following is aspecifieation.

lThis invention relates to that class of tool holders in which the stockof the holder is formed with a holding orifice for the cutter blade andwith an extension bar or tang for holding engagement in the tool post of a lathe or like machine. And the presentl im* provement has forvitsobject to provide a strong and substantial structural formation andassociation of parts wherein the thin and fiat adjustable cutter bladegenerally used in cutting off77 operations on lathes is secured in placein a firm and rigid manner, with an avoidance of any tendency to chatterin actual use, all as will hereinafter more fully appear. v

lin the accompanying drawings: Figure 1, is a perspective viewillustrating the general arrangement of parts. Fig. 1, is a perspectiveview of a boring tool adapted for use in the holder. Fig. 2, is a sideelevation. Fig. 3, is a transverse section on line m-, Fig. 2. Fig. 4,is a similar view of a modified arrangement of parts.

Similar reference numerals indicate like parts in the several views.

Referring to the drawings, 1 designates the main body or stock of theholder, provided with an extension bar or tang 2, by which it is securedin the tool post of the slide rest of a lathe or like machine. In thepresent improvement the aforesaid bar or tang 2, is offset from theaforesaid main body 1, so as to be in a plane to one side of thehereinafter described elongated cutter blade when the same is in placewithin the holding orifice in said main body, now to be described.

3 designates a holding orifice extending longitudinally through thestock 1, and having a wedge form in cross-section, one side wall havinga vertical disposition and the companion side wall having an inclineddisposition as shown.

4 designates a thin flat strip of tool steel constituting the high-speedcutter blade generally employed in metal working operations, and whichblade is adapted to be clamped laterally against the above describedvertical side wall of the longitudinal orifice 3 of the stock 1, bymeans hereinafter described.

5 designates one or more set-screws turning in the top portion of thestock 1, and having bearing upon the top of the cutter blade 4to preventany vertical movement or shift of the same.

6` designates a wedge shaped clamping block disposed within thelongitudinal hold ing orifice 3 aforesaid, and havingaan inclined sidecorresponding to and in bearing engagement with the inclined side wallof the orifice 3. The opposite side of said clamping block G has avertical disposition and is adapted for bearing engagement with theadjacent vertical side of the cutter blade 4. In the present structuresaid clamping block 6, is of less height than its holding orifice 3, andis adapted to have limited independent vertical movement therein, in anassemblage or disassemblage of the tool parts.

7 designates a vertically disposed binding screw having the usualoperating head or top, and screwing through a screw-threaded orifice inthe hub formed therefor on the top portion of the stock l. Said bindingscrew has bearing against the top surface of the clamping block 6,aforesaid, midway the length thereof, and is adapted to force saidclamping block downwardly in the holding orifice 3, and in such downwardmovement said block` receives a simultaneous and powerful lateralmovement to very effectively clamp the cutter blade 4, in place.

8 designates a transverse orifice formed in the stock 1, andintersecting the aforesaid longitudinal holding orifice 3 in a plane beneath the binding screw 7. Said transverse orifice 8, is adapted, insome uses of the present tool holder, to receive a round boring rod 9,shown in Figs. 1CL and 4, and which is clamped in place by the bindingscrew 7, above described.

In the manufacture of the present holder the holding orifice 3, willusually be formed by the usual drifting method where however it isdesired to form the same by a milling7 method, a longitudinal openingwill be formed in one of the side walls of the said holding orifice, asillustrated in Fig. 4,

Having thus fully described my said in-v vention what I claim as new anddesire to I secure by Letters Patent, is:

l. A tool holder, comprising a stock formed with a longitudinal holdingorifice, the outer side Wall of which is vertical and the inner sideWall of which is inclined, an integrally formed holding tang havingoli-set relation to the aforesaid inclined Wall of the holding orifice,a Wedge block disposed in said holding orifice and adapted to clamp acutterblade against the outer vertical Wall of said orifice, and abinding screw having engagement against the top of said Wedge block.

2. A tool holder, comprising a stock formed With a longitudinal holdingorifice one side Wall of which is vertical and the other side Wall ofwhich is inclined, an integrally formed holding tang oiset from thestock and in a plane to one side of the holding orifice thereof, a.Wedge block disposed in said holding orifice and adapted to clamp acutter blade against the vertical wall or said orifice, a binding screwhaving bearing on the top of said wedge block, and a plurality ofset-screws disposed at opposite sides of' the binding screw aforesaidand adapted for engagement with the top of ay cutter blade.

Signed at Chicago, Illinois, this 5th day of June, 1915.

GUSTAF SELANDER.

Copies o f this patent may be obtained for five cents each, byaddressing the Commissioner of Patents.

Washington, D. C.

